Year	base year varies by country
1960	0.010044471217909353
1961	0.010902545629769047
1962	0.011076229143614358
1963	0.011598010033216635
1964	0.012051025717738254
1965	0.01176244252388156
1966	0.012515750588837438
1967	0.013361788473773882
1968	0.013678147808295375
1969	0.014855488938698985
1970	0.015943005404656065
1971	0.01698916509991493
1972	0.019419541629250713
1973	0.02391547285981705
1974	0.027607803295403265
1975	0.02906667310078143
1976	0.031062397257646316
1977	0.036468496403286504
1978	0.04555277070280667
1979	0.05647399400402714
1980	0.06891327508869623
1981	0.0861258675373332
1982	0.11247198518379077
1983	0.1417800015017686
1984	0.1894703744460314
1985	0.27694722681428297
1986	0.356271993129388
1987	0.4485156334069434
1988	0.8022267068827893
1989	1.0969539844197689
1990	1.823527909951233
1991	3.442325538012169
1992	7.202503545755954
1993	14.224033260187529
1994	36.878220413747734
1995	75.43625438362903
1996	100
1997	137.92116997776697
1998	162.28118046253903
1999	187.95986965777257
2000	206.4798129705919
2001	250.11723815499698
2002	277.13298940355844
2003	304.29181203216876
2004	356.8551733091004
2005	421.28324395530933
2006	453.52090912824076
2007	522.9396380183697
2008	569.4342881111417
2009	580.0379055998716
2010	711.5291300066183
2011	898.8630094580199
2012	1169.6777884595938
2013	1595.7753718895763
2014	2139.407936745549
2015	2439.407643535141
2016	2944.0134517461624
2017	3963.3007033958797
2018	6181.771170436431
2019	9394.98741404506
2020	20260.56422362323
2021	67977.32192717503
2022	147425.18841518112
2023	452469.619712738